(Objective-C) Hash Algorithms: SHA-1, HAVAL, MD2, MD5, SHA-256, SHA-384, SHA-512

How to create hashes (message digests) for strings.

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#import <CkoCrypt2.h>
#import <NSString.h>

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

CkoCrypt2 *crypt = [[CkoCrypt2 alloc] init];

NSString *s = @"The quick brown fox jumps over the lazy dog";

crypt.HashAlgorithm = @"sha1";
crypt.EncodingMode = @"hex";

// Other possible EncodingMode settings are: 
// "quoted-printable", "base64","url", and many more..

NSString *hash = [crypt HashStringENC: s];
NSLog(@"%@%@",@"SHA1: ",hash);

// Hash using MD2
crypt.HashAlgorithm = @"md2";
hash = [crypt HashStringENC: s];
NSLog(@"%@%@",@"MD2: ",hash);

// Hash using MD5
crypt.HashAlgorithm = @"md5";
hash = [crypt HashStringENC: s];
NSLog(@"%@%@",@"MD5: ",hash);

// Note: SHA-2 is a set of cryptographic hash functions (SHA-224, SHA-256, SHA-384, SHA-512)

// Hash using SHA-256
crypt.HashAlgorithm = @"sha256";
hash = [crypt HashStringENC: s];
NSLog(@"%@%@",@"SHA256: ",hash);

// Hash using SHA-384
crypt.HashAlgorithm = @"sha384";
hash = [crypt HashStringENC: s];
NSLog(@"%@%@",@"SHA384: ",hash);

// Hash using SHA-512
crypt.HashAlgorithm = @"sha512";
hash = [crypt HashStringENC: s];
NSLog(@"%@%@",@"SHA512: ",hash);

// Hash using HAVAL
// There are two additional properties relevant to HAVAL:
// HavalRounds, and KeyLength.
// HavalRounds can have values of 3, 4, or 5.
// KeyLength can have values of 128, 160, 192, 224, or 256
crypt.HashAlgorithm = @"haval";
crypt.HavalRounds = [NSNumber numberWithInt:5];
crypt.KeyLength = [NSNumber numberWithInt:256];
hash = [crypt HashStringENC: s];
NSLog(@"%@%@",@"Haval: ",hash);

// Hashes for "The quick brown fox jumps over the lazy dog"

// SHA1:
// 2FD4E1C67A2D28FCED849EE1BB76E7391B93EB12

// MD2:
// 03D85A0D629D2C442E987525319FC471

// MD5:
// 9E107D9D372BB6826BD81D3542A419D6

// SHA256:
// D7A8FBB307D7809469CA9ABCB0082E4F8D5651E46D3CDB762D02D0BF37C9E592

// SHA384:
// CA737F1014A48F4C0B6DD43CB177B0AFD9E5169367544C494011E3317DBF9A509CB1E5DC1E85A941BBEE3D7F2AFBC9B1

// SHA512:
// 07E547D9586F6A73F73FBAC0435ED76951218FB7D0C8D788A309D785436BBB642E93A252A954F23912547D1E8A3B5ED6E1BFD7097821233FA0538F3DB854FEE6

// Haval:
// B89C551CDFE2E06DBD4CEA2BE1BC7D557416C58EBB4D07CBC94E49F710C55BE